A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor

Tianliang Li; Yuegang Tan; Yi Liu; Yongzhi Qu; Mingyao Liu; Zude Zhou

doi:10.3390/s150924214

Sensors (Sep 2015)

A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor

Tianliang Li,
Yuegang Tan,
Yi Liu,
Yongzhi Qu,
Mingyao Liu,
Zude Zhou

Affiliations

Tianliang Li: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Yuegang Tan: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Yi Liu: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Yongzhi Qu: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Mingyao Liu: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Zude Zhou: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China

DOI: https://doi.org/10.3390/s150924214
Journal volume & issue: Vol. 15, no. 9
pp. 24214 – 24229

Abstract

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A fiber Bragg grating (FBG) sensing based triaxial vibration sensor has been presented in this paper. The optical fiber is directly employed as elastomer, and the triaxial vibration of a measured body can be obtained by two pairs of FBGs. A model of a triaxial vibration sensor as well as decoupling principles of triaxial vibration and experimental analyses are proposed. Experimental results show that: sensitivities of 86.9 pm/g, 971.8 pm/g and 154.7 pm/g for each orthogonal sensitive direction with linearity are separately 3.64%, 1.50% and 3.01%. The flat frequency ranges reside in 20–200 Hz, 3–20 Hz and 4–50 Hz, respectively; in addition, the resonant frequencies are separately 700 Hz, 40 Hz and 110 Hz in the x/y/z direction. When the sensor is excited in a single direction vibration, the outputs of sensor in the other two directions are consistent with the outputs in the non-working state. Therefore, it is effectively demonstrated that it can be used for three-dimensional vibration measurement.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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